FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
fft_vsx.h
Go to the documentation of this file.
1 #ifndef AVCODEC_PPC_FFT_VSX_H
2 #define AVCODEC_PPC_FFT_VSX_H
3 /*
4  * FFT transform, optimized with VSX built-in functions
5  * Copyright (c) 2014 Rong Yan Copyright (c) 2009 Loren Merritt
6  *
7  * This algorithm (though not any of the implementation details) is
8  * based on libdjbfft by D. J. Bernstein, and fft_altivec_s.S.
9  *
10  * This file is part of FFmpeg.
11  *
12  * FFmpeg is free software; you can redistribute it and/or
13  * modify it under the terms of the GNU Lesser General Public
14  * License as published by the Free Software Foundation; either
15  * version 2.1 of the License, or (at your option) any later version.
16  *
17  * FFmpeg is distributed in the hope that it will be useful,
18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20  * Lesser General Public License for more details.
21  *
22  * You should have received a copy of the GNU Lesser General Public
23  * License along with FFmpeg; if not, write to the Free Software
24  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25  */
26 
27 
28 #include "config.h"
29 #include "libavutil/cpu.h"
31 #include "libavcodec/fft.h"
33 
34 #if HAVE_VSX
35 
36 void ff_fft_calc_interleave_vsx(FFTContext *s, FFTComplex *z);
37 void ff_fft_calc_vsx(FFTContext *s, FFTComplex *z);
38 
39 
40 #define byte_2complex (2*sizeof(FFTComplex))
41 #define byte_4complex (4*sizeof(FFTComplex))
42 #define byte_6complex (6*sizeof(FFTComplex))
43 #define byte_8complex (8*sizeof(FFTComplex))
44 #define byte_10complex (10*sizeof(FFTComplex))
45 #define byte_12complex (12*sizeof(FFTComplex))
46 #define byte_14complex (14*sizeof(FFTComplex))
47 
48 inline static void pass_vsx_interleave(FFTComplex *z, const FFTSample *wre, unsigned int n)
49 {
50  int o1 = n<<1;
51  int o2 = n<<2;
52  int o3 = o1+o2;
53  int i1, i2, i3;
54  FFTSample* out = (FFTSample*)z;
55  const FFTSample *wim = wre+o1;
56  vec_f vz0, vzo1, vzo2, vzo3;
57  vec_f x0, x1, x2, x3;
58  vec_f x4, x5, x6, x7;
59  vec_f x8, x9, x10, x11;
60  vec_f x12, x13, x14, x15;
61  vec_f x16, x17, x18, x19;
62  vec_f x20, x21, x22, x23;
63  vec_f vz0plus1, vzo1plus1, vzo2plus1, vzo3plus1;
64  vec_f y0, y1, y2, y3;
65  vec_f y4, y5, y8, y9;
66  vec_f y10, y13, y14, y15;
67  vec_f y16, y17, y18, y19;
68  vec_f y20, y21, y22, y23;
69  vec_f wr1, wi1, wr0, wi0;
70  vec_f wr2, wi2, wr3, wi3;
71  vec_f xmulwi0, xmulwi1, ymulwi2, ymulwi3;
72 
73  n = n-2;
74  i1 = o1*sizeof(FFTComplex);
75  i2 = o2*sizeof(FFTComplex);
76  i3 = o3*sizeof(FFTComplex);
77  vzo2 = vec_ld(i2, &(out[0])); // zo2.r zo2.i z(o2+1).r z(o2+1).i
78  vzo2plus1 = vec_ld(i2+16, &(out[0]));
79  vzo3 = vec_ld(i3, &(out[0])); // zo3.r zo3.i z(o3+1).r z(o3+1).i
80  vzo3plus1 = vec_ld(i3+16, &(out[0]));
81  vz0 = vec_ld(0, &(out[0])); // z0.r z0.i z1.r z1.i
82  vz0plus1 = vec_ld(16, &(out[0]));
83  vzo1 = vec_ld(i1, &(out[0])); // zo1.r zo1.i z(o1+1).r z(o1+1).i
84  vzo1plus1 = vec_ld(i1+16, &(out[0]));
85 
86  x0 = vec_add(vzo2, vzo3);
87  x1 = vec_sub(vzo2, vzo3);
88  y0 = vec_add(vzo2plus1, vzo3plus1);
89  y1 = vec_sub(vzo2plus1, vzo3plus1);
90 
91  wr1 = vec_splats(wre[1]);
92  wi1 = vec_splats(wim[-1]);
93  wi2 = vec_splats(wim[-2]);
94  wi3 = vec_splats(wim[-3]);
95  wr2 = vec_splats(wre[2]);
96  wr3 = vec_splats(wre[3]);
97 
98  x2 = vec_perm(x0, x1, vcprm(2,s2,3,s3));
99  x3 = vec_perm(x0, x1, vcprm(s3,3,s2,2));
100 
101  y4 = vec_perm(y0, y1, vcprm(s1,1,s0,0));
102  y5 = vec_perm(y0, y1, vcprm(s3,3,s2,2));
103  y2 = vec_perm(y0, y1, vcprm(0,s0,1,s1));
104  y3 = vec_perm(y0, y1, vcprm(2,s2,3,s3));
105 
106  ymulwi2 = vec_mul(y4, wi2);
107  ymulwi3 = vec_mul(y5, wi3);
108  x4 = vec_mul(x2, wr1);
109  x5 = vec_mul(x3, wi1);
110  y8 = vec_madd(y2, wr2, ymulwi2);
111  y9 = vec_msub(y2, wr2, ymulwi2);
112  x6 = vec_add(x4, x5);
113  x7 = vec_sub(x4, x5);
114  y13 = vec_madd(y3, wr3, ymulwi3);
115  y14 = vec_msub(y3, wr3, ymulwi3);
116 
117  x8 = vec_perm(x6, x7, vcprm(0,1,s2,s3));
118  y10 = vec_perm(y8, y9, vcprm(0,1,s2,s3));
119  y15 = vec_perm(y13, y14, vcprm(0,1,s2,s3));
120 
121  x9 = vec_perm(x0, x8, vcprm(0,1,s0,s2));
122  x10 = vec_perm(x1, x8, vcprm(1,0,s3,s1));
123 
124  y16 = vec_perm(y10, y15, vcprm(0,2,s0,s2));
125  y17 = vec_perm(y10, y15, vcprm(3,1,s3,s1));
126 
127  x11 = vec_add(vz0, x9);
128  x12 = vec_sub(vz0, x9);
129  x13 = vec_add(vzo1, x10);
130  x14 = vec_sub(vzo1, x10);
131 
132  y18 = vec_add(vz0plus1, y16);
133  y19 = vec_sub(vz0plus1, y16);
134  y20 = vec_add(vzo1plus1, y17);
135  y21 = vec_sub(vzo1plus1, y17);
136 
137  x15 = vec_perm(x13, x14, vcprm(0,s1,2,s3));
138  x16 = vec_perm(x13, x14, vcprm(s0,1,s2,3));
139  y22 = vec_perm(y20, y21, vcprm(0,s1,2,s3));
140  y23 = vec_perm(y20, y21, vcprm(s0,1,s2,3));
141 
142 
143  vec_st(x11, 0, &(out[0]));
144  vec_st(y18, 16, &(out[0]));
145  vec_st(x15, i1, &(out[0]));
146  vec_st(y22, i1+16, &(out[0]));
147  vec_st(x12, i2, &(out[0]));
148  vec_st(y19, i2+16, &(out[0]));
149  vec_st(x16, i3, &(out[0]));
150  vec_st(y23, i3+16, &(out[0]));
151 
152  do {
153  out += 8;
154  wre += 4;
155  wim -= 4;
156  wr0 = vec_splats(wre[0]);
157  wr1 = vec_splats(wre[1]);
158  wi0 = vec_splats(wim[0]);
159  wi1 = vec_splats(wim[-1]);
160 
161  wr2 = vec_splats(wre[2]);
162  wr3 = vec_splats(wre[3]);
163  wi2 = vec_splats(wim[-2]);
164  wi3 = vec_splats(wim[-3]);
165 
166  vzo2 = vec_ld(i2, &(out[0])); // zo2.r zo2.i z(o2+1).r z(o2+1).i
167  vzo2plus1 = vec_ld(i2+16, &(out[0]));
168  vzo3 = vec_ld(i3, &(out[0])); // zo3.r zo3.i z(o3+1).r z(o3+1).i
169  vzo3plus1 = vec_ld(i3+16, &(out[0]));
170  vz0 = vec_ld(0, &(out[0])); // z0.r z0.i z1.r z1.i
171  vz0plus1 = vec_ld(16, &(out[0]));
172  vzo1 = vec_ld(i1, &(out[0])); // zo1.r zo1.i z(o1+1).r z(o1+1).i
173  vzo1plus1 = vec_ld(i1+16, &(out[0]));
174 
175  x0 = vec_add(vzo2, vzo3);
176  x1 = vec_sub(vzo2, vzo3);
177 
178  y0 = vec_add(vzo2plus1, vzo3plus1);
179  y1 = vec_sub(vzo2plus1, vzo3plus1);
180 
181  x4 = vec_perm(x0, x1, vcprm(s1,1,s0,0));
182  x5 = vec_perm(x0, x1, vcprm(s3,3,s2,2));
183  x2 = vec_perm(x0, x1, vcprm(0,s0,1,s1));
184  x3 = vec_perm(x0, x1, vcprm(2,s2,3,s3));
185 
186  y2 = vec_perm(y0, y1, vcprm(0,s0,1,s1));
187  y3 = vec_perm(y0, y1, vcprm(2,s2,3,s3));
188  xmulwi0 = vec_mul(x4, wi0);
189  xmulwi1 = vec_mul(x5, wi1);
190 
191  y4 = vec_perm(y0, y1, vcprm(s1,1,s0,0));
192  y5 = vec_perm(y0, y1, vcprm(s3,3,s2,2));
193 
194  x8 = vec_madd(x2, wr0, xmulwi0);
195  x9 = vec_msub(x2, wr0, xmulwi0);
196  ymulwi2 = vec_mul(y4, wi2);
197  ymulwi3 = vec_mul(y5, wi3);
198 
199  x13 = vec_madd(x3, wr1, xmulwi1);
200  x14 = vec_msub(x3, wr1, xmulwi1);
201 
202  y8 = vec_madd(y2, wr2, ymulwi2);
203  y9 = vec_msub(y2, wr2, ymulwi2);
204  y13 = vec_madd(y3, wr3, ymulwi3);
205  y14 = vec_msub(y3, wr3, ymulwi3);
206 
207  x10 = vec_perm(x8, x9, vcprm(0,1,s2,s3));
208  x15 = vec_perm(x13, x14, vcprm(0,1,s2,s3));
209 
210  y10 = vec_perm(y8, y9, vcprm(0,1,s2,s3));
211  y15 = vec_perm(y13, y14, vcprm(0,1,s2,s3));
212 
213  x16 = vec_perm(x10, x15, vcprm(0,2,s0,s2));
214  x17 = vec_perm(x10, x15, vcprm(3,1,s3,s1));
215 
216  y16 = vec_perm(y10, y15, vcprm(0,2,s0,s2));
217  y17 = vec_perm(y10, y15, vcprm(3,1,s3,s1));
218 
219  x18 = vec_add(vz0, x16);
220  x19 = vec_sub(vz0, x16);
221  x20 = vec_add(vzo1, x17);
222  x21 = vec_sub(vzo1, x17);
223 
224  y18 = vec_add(vz0plus1, y16);
225  y19 = vec_sub(vz0plus1, y16);
226  y20 = vec_add(vzo1plus1, y17);
227  y21 = vec_sub(vzo1plus1, y17);
228 
229  x22 = vec_perm(x20, x21, vcprm(0,s1,2,s3));
230  x23 = vec_perm(x20, x21, vcprm(s0,1,s2,3));
231 
232  y22 = vec_perm(y20, y21, vcprm(0,s1,2,s3));
233  y23 = vec_perm(y20, y21, vcprm(s0,1,s2,3));
234 
235  vec_st(x18, 0, &(out[0]));
236  vec_st(y18, 16, &(out[0]));
237  vec_st(x22, i1, &(out[0]));
238  vec_st(y22, i1+16, &(out[0]));
239  vec_st(x19, i2, &(out[0]));
240  vec_st(y19, i2+16, &(out[0]));
241  vec_st(x23, i3, &(out[0]));
242  vec_st(y23, i3+16, &(out[0]));
243  } while (n-=2);
244 }
245 
246 inline static void fft2_vsx_interleave(FFTComplex *z)
247 {
248  FFTSample r1, i1;
249 
250  r1 = z[0].re - z[1].re;
251  z[0].re += z[1].re;
252  z[1].re = r1;
253 
254  i1 = z[0].im - z[1].im;
255  z[0].im += z[1].im;
256  z[1].im = i1;
257  }
258 
259 inline static void fft4_vsx_interleave(FFTComplex *z)
260 {
261  vec_f a, b, c, d;
262  float* out= (float*)z;
263  a = vec_ld(0, &(out[0]));
264  b = vec_ld(byte_2complex, &(out[0]));
265 
266  c = vec_perm(a, b, vcprm(0,1,s2,s1));
267  d = vec_perm(a, b, vcprm(2,3,s0,s3));
268  a = vec_add(c, d);
269  b = vec_sub(c, d);
270 
271  c = vec_perm(a, b, vcprm(0,1,s0,s1));
272  d = vec_perm(a, b, vcprm(2,3,s3,s2));
273 
274  a = vec_add(c, d);
275  b = vec_sub(c, d);
276  vec_st(a, 0, &(out[0]));
277  vec_st(b, byte_2complex, &(out[0]));
278 }
279 
280 inline static void fft8_vsx_interleave(FFTComplex *z)
281 {
282  vec_f vz0, vz1, vz2, vz3;
283  vec_f x0, x1, x2, x3;
284  vec_f x4, x5, x6, x7;
285  vec_f x8, x9, x10, x11;
286  vec_f x12, x13, x14, x15;
287  vec_f x16, x17, x18, x19;
288  vec_f x20, x21, x22, x23;
289  vec_f x24, x25, x26, x27;
290  vec_f x28, x29, x30, x31;
291  vec_f x32, x33, x34;
292 
293  float* out= (float*)z;
294  vec_f vc1 = {sqrthalf, sqrthalf, sqrthalf, sqrthalf};
295 
296  vz0 = vec_ld(0, &(out[0]));
297  vz1 = vec_ld(byte_2complex, &(out[0]));
298  vz2 = vec_ld(byte_4complex, &(out[0]));
299  vz3 = vec_ld(byte_6complex, &(out[0]));
300 
301  x0 = vec_perm(vz0, vz1, vcprm(0,1,s2,s1));
302  x1 = vec_perm(vz0, vz1, vcprm(2,3,s0,s3));
303  x2 = vec_perm(vz2, vz3, vcprm(2,1,s0,s1));
304  x3 = vec_perm(vz2, vz3, vcprm(0,3,s2,s3));
305 
306  x4 = vec_add(x0, x1);
307  x5 = vec_sub(x0, x1);
308  x6 = vec_add(x2, x3);
309  x7 = vec_sub(x2, x3);
310 
311  x8 = vec_perm(x4, x5, vcprm(0,1,s0,s1));
312  x9 = vec_perm(x4, x5, vcprm(2,3,s3,s2));
313  x10 = vec_perm(x6, x7, vcprm(2,1,s2,s1));
314  x11 = vec_perm(x6, x7, vcprm(0,3,s0,s3));
315 
316  x12 = vec_add(x8, x9);
317  x13 = vec_sub(x8, x9);
318  x14 = vec_add(x10, x11);
319  x15 = vec_sub(x10, x11);
320  x16 = vec_perm(x12, x13, vcprm(0,s0,1,s1));
321  x17 = vec_perm(x14, x15, vcprm(0,s0,1,s1));
322  x18 = vec_perm(x16, x17, vcprm(s0,s3,s2,s1));
323  x19 = vec_add(x16, x18); // z0.r z2.r z0.i z2.i
324  x20 = vec_sub(x16, x18); // z4.r z6.r z4.i z6.i
325 
326  x21 = vec_perm(x12, x13, vcprm(2,s2,3,s3));
327  x22 = vec_perm(x14, x15, vcprm(2,3,s2,s3));
328  x23 = vec_perm(x14, x15, vcprm(3,2,s3,s2));
329  x24 = vec_add(x22, x23);
330  x25 = vec_sub(x22, x23);
331  x26 = vec_mul( vec_perm(x24, x25, vcprm(2,s2,0,s0)), vc1);
332 
333  x27 = vec_add(x21, x26); // z1.r z7.r z1.i z3.i
334  x28 = vec_sub(x21, x26); //z5.r z3.r z5.i z7.i
335 
336  x29 = vec_perm(x19, x27, vcprm(0,2,s0,s2)); // z0.r z0.i z1.r z1.i
337  x30 = vec_perm(x19, x27, vcprm(1,3,s1,s3)); // z2.r z2.i z7.r z3.i
338  x31 = vec_perm(x20, x28, vcprm(0,2,s0,s2)); // z4.r z4.i z5.r z5.i
339  x32 = vec_perm(x20, x28, vcprm(1,3,s1,s3)); // z6.r z6.i z3.r z7.i
340  x33 = vec_perm(x30, x32, vcprm(0,1,s2,3)); // z2.r z2.i z3.r z3.i
341  x34 = vec_perm(x30, x32, vcprm(s0,s1,2,s3)); // z6.r z6.i z7.r z7.i
342 
343  vec_st(x29, 0, &(out[0]));
344  vec_st(x33, byte_2complex, &(out[0]));
345  vec_st(x31, byte_4complex, &(out[0]));
346  vec_st(x34, byte_6complex, &(out[0]));
347 }
348 
349 inline static void fft16_vsx_interleave(FFTComplex *z)
350 {
351  float* out= (float*)z;
352  vec_f vc0 = {sqrthalf, sqrthalf, sqrthalf, sqrthalf};
353  vec_f vc1 = {ff_cos_16[1], ff_cos_16[1], ff_cos_16[1], ff_cos_16[1]};
354  vec_f vc2 = {ff_cos_16[3], ff_cos_16[3], ff_cos_16[3], ff_cos_16[3]};
355  vec_f vz0, vz1, vz2, vz3;
356  vec_f vz4, vz5, vz6, vz7;
357  vec_f x0, x1, x2, x3;
358  vec_f x4, x5, x6, x7;
359  vec_f x8, x9, x10, x11;
360  vec_f x12, x13, x14, x15;
361  vec_f x16, x17, x18, x19;
362  vec_f x20, x21, x22, x23;
363  vec_f x24, x25, x26, x27;
364  vec_f x28, x29, x30, x31;
365  vec_f x32, x33, x34, x35;
366  vec_f x36, x37, x38, x39;
367  vec_f x40, x41, x42, x43;
368  vec_f x44, x45, x46, x47;
369  vec_f x48, x49, x50, x51;
370  vec_f x52, x53, x54, x55;
371  vec_f x56, x57, x58, x59;
372  vec_f x60, x61, x62, x63;
373  vec_f x64, x65, x66, x67;
374  vec_f x68, x69, x70, x71;
375  vec_f x72, x73, x74, x75;
376  vec_f x76, x77, x78, x79;
377  vec_f x80, x81, x82, x83;
378  vec_f x84, x85, x86;
379 
380  vz0 = vec_ld(0, &(out[0]));
381  vz1 = vec_ld(byte_2complex, &(out[0]));
382  vz2 = vec_ld(byte_4complex, &(out[0]));
383  vz3 = vec_ld(byte_6complex, &(out[0]));
384  vz4 = vec_ld(byte_8complex, &(out[0]));
385  vz5 = vec_ld(byte_10complex, &(out[0]));
386  vz6 = vec_ld(byte_12complex, &(out[0]));
387  vz7 = vec_ld(byte_14complex, &(out[0]));
388 
389  x0 = vec_perm(vz0, vz1, vcprm(0,1,s2,s1));
390  x1 = vec_perm(vz0, vz1, vcprm(2,3,s0,s3));
391  x2 = vec_perm(vz2, vz3, vcprm(0,1,s0,s1));
392  x3 = vec_perm(vz2, vz3, vcprm(2,3,s2,s3));
393 
394  x4 = vec_perm(vz4, vz5, vcprm(0,1,s2,s1));
395  x5 = vec_perm(vz4, vz5, vcprm(2,3,s0,s3));
396  x6 = vec_perm(vz6, vz7, vcprm(0,1,s2,s1));
397  x7 = vec_perm(vz6, vz7, vcprm(2,3,s0,s3));
398 
399  x8 = vec_add(x0, x1);
400  x9 = vec_sub(x0, x1);
401  x10 = vec_add(x2, x3);
402  x11 = vec_sub(x2, x3);
403 
404  x12 = vec_add(x4, x5);
405  x13 = vec_sub(x4, x5);
406  x14 = vec_add(x6, x7);
407  x15 = vec_sub(x6, x7);
408 
409  x16 = vec_perm(x8, x9, vcprm(0,1,s0,s1));
410  x17 = vec_perm(x8, x9, vcprm(2,3,s3,s2));
411  x18 = vec_perm(x10, x11, vcprm(2,1,s1,s2));
412  x19 = vec_perm(x10, x11, vcprm(0,3,s0,s3));
413  x20 = vec_perm(x12, x14, vcprm(0,1,s0, s1));
414  x21 = vec_perm(x12, x14, vcprm(2,3,s2,s3));
415  x22 = vec_perm(x13, x15, vcprm(0,1,s0,s1));
416  x23 = vec_perm(x13, x15, vcprm(3,2,s3,s2));
417 
418  x24 = vec_add(x16, x17);
419  x25 = vec_sub(x16, x17);
420  x26 = vec_add(x18, x19);
421  x27 = vec_sub(x18, x19);
422  x28 = vec_add(x20, x21);
423  x29 = vec_sub(x20, x21);
424  x30 = vec_add(x22, x23);
425  x31 = vec_sub(x22, x23);
426 
427  x32 = vec_add(x24, x26);
428  x33 = vec_sub(x24, x26);
429  x34 = vec_perm(x32, x33, vcprm(0,1,s0,s1));
430 
431  x35 = vec_perm(x28, x29, vcprm(2,1,s1,s2));
432  x36 = vec_perm(x28, x29, vcprm(0,3,s0,s3));
433  x37 = vec_add(x35, x36);
434  x38 = vec_sub(x35, x36);
435  x39 = vec_perm(x37, x38, vcprm(0,1,s1,s0));
436 
437  x40 = vec_perm(x27, x38, vcprm(3,2,s2,s3));
438  x41 = vec_perm(x26, x37, vcprm(2,3,s3,s2));
439  x42 = vec_add(x40, x41);
440  x43 = vec_sub(x40, x41);
441  x44 = vec_mul(x42, vc0);
442  x45 = vec_mul(x43, vc0);
443 
444  x46 = vec_add(x34, x39); // z0.r z0.i z4.r z4.i
445  x47 = vec_sub(x34, x39); // z8.r z8.i z12.r z12.i
446 
447  x48 = vec_perm(x30, x31, vcprm(2,1,s1,s2));
448  x49 = vec_perm(x30, x31, vcprm(0,3,s3,s0));
449  x50 = vec_add(x48, x49);
450  x51 = vec_sub(x48, x49);
451  x52 = vec_mul(x50, vc1);
452  x53 = vec_mul(x50, vc2);
453  x54 = vec_mul(x51, vc1);
454  x55 = vec_mul(x51, vc2);
455 
456  x56 = vec_perm(x24, x25, vcprm(2,3,s2,s3));
457  x57 = vec_perm(x44, x45, vcprm(0,1,s1,s0));
458  x58 = vec_add(x56, x57);
459  x59 = vec_sub(x56, x57);
460 
461  x60 = vec_perm(x54, x55, vcprm(1,0,3,2));
462  x61 = vec_perm(x54, x55, vcprm(s1,s0,s3,s2));
463  x62 = vec_add(x52, x61);
464  x63 = vec_sub(x52, x61);
465  x64 = vec_add(x60, x53);
466  x65 = vec_sub(x60, x53);
467  x66 = vec_perm(x62, x64, vcprm(0,1,s3,s2));
468  x67 = vec_perm(x63, x65, vcprm(s0,s1,3,2));
469 
470  x68 = vec_add(x58, x66); // z1.r z1.i z3.r z3.i
471  x69 = vec_sub(x58, x66); // z9.r z9.i z11.r z11.i
472  x70 = vec_add(x59, x67); // z5.r z5.i z15.r z15.i
473  x71 = vec_sub(x59, x67); // z13.r z13.i z7.r z7.i
474 
475  x72 = vec_perm(x25, x27, vcprm(s1,s0,s2,s3));
476  x73 = vec_add(x25, x72);
477  x74 = vec_sub(x25, x72);
478  x75 = vec_perm(x73, x74, vcprm(0,1,s0,s1));
479  x76 = vec_perm(x44, x45, vcprm(3,2,s2,s3));
480  x77 = vec_add(x75, x76); // z2.r z2.i z6.r z6.i
481  x78 = vec_sub(x75, x76); // z10.r z10.i z14.r z14.i
482 
483  x79 = vec_perm(x46, x68, vcprm(0,1,s0,s1)); // z0.r z0.i z1.r z1.i
484  x80 = vec_perm(x77, x68, vcprm(0,1,s2,s3)); // z2.r z2.i z3.r z3.i
485  x81 = vec_perm(x46, x70, vcprm(2,3,s0,s1)); // z4.r z4.i z5.r z5.i
486  x82 = vec_perm(x71, x77, vcprm(s2,s3,2,3)); // z6.r z6.i z7.r z7.i
487  vec_st(x79, 0, &(out[0]));
488  vec_st(x80, byte_2complex, &(out[0]));
489  vec_st(x81, byte_4complex, &(out[0]));
490  vec_st(x82, byte_6complex, &(out[0]));
491  x83 = vec_perm(x47, x69, vcprm(0,1,s0,s1)); // z8.r z8.i z9.r z9.i
492  x84 = vec_perm(x78, x69, vcprm(0,1,s2,s3)); // z10.r z10.i z11.r z11.i
493  x85 = vec_perm(x47, x71, vcprm(2,3,s0,s1)); // z12.r z12.i z13.r z13.i
494  x86 = vec_perm(x70, x78, vcprm(s2,s3,2,3)); // z14.r z14.i z15.r z15.i
495  vec_st(x83, byte_8complex, &(out[0]));
496  vec_st(x84, byte_10complex, &(out[0]));
497  vec_st(x85, byte_12complex, &(out[0]));
498  vec_st(x86, byte_14complex, &(out[0]));
499 }
500 
501 inline static void fft4_vsx(FFTComplex *z)
502 {
503  vec_f a, b, c, d;
504  float* out= (float*)z;
505  a = vec_ld(0, &(out[0]));
506  b = vec_ld(byte_2complex, &(out[0]));
507 
508  c = vec_perm(a, b, vcprm(0,1,s2,s1));
509  d = vec_perm(a, b, vcprm(2,3,s0,s3));
510  a = vec_add(c, d);
511  b = vec_sub(c, d);
512 
513  c = vec_perm(a,b, vcprm(0,s0,1,s1));
514  d = vec_perm(a, b, vcprm(2,s3,3,s2));
515 
516  a = vec_add(c, d);
517  b = vec_sub(c, d);
518 
519  c = vec_perm(a, b, vcprm(0,1,s0,s1));
520  d = vec_perm(a, b, vcprm(2,3,s2,s3));
521 
522  vec_st(c, 0, &(out[0]));
523  vec_st(d, byte_2complex, &(out[0]));
524  return;
525 }
526 
527 inline static void fft8_vsx(FFTComplex *z)
528 {
529  vec_f vz0, vz1, vz2, vz3;
530  vec_f vz4, vz5, vz6, vz7, vz8;
531 
532  float* out= (float*)z;
533  vec_f vc0 = {0.0, 0.0, 0.0, 0.0};
534  vec_f vc1 = {-sqrthalf, sqrthalf, sqrthalf, -sqrthalf};
535  vec_f vc2 = {sqrthalf, sqrthalf, sqrthalf, sqrthalf};
536 
537  vz0 = vec_ld(0, &(out[0]));
538  vz1 = vec_ld(byte_2complex, &(out[0]));
539  vz2 = vec_ld(byte_4complex, &(out[0]));
540  vz3 = vec_ld(byte_6complex, &(out[0]));
541 
542  vz6 = vec_perm(vz2, vz3, vcprm(0,s0,1,s1));
543  vz7 = vec_perm(vz2, vz3, vcprm(2,s2,3,s3));
544  vz4 = vec_perm(vz0, vz1, vcprm(0,1,s2,s1));
545  vz5 = vec_perm(vz0, vz1, vcprm(2,3,s0,s3));
546 
547  vz2 = vec_add(vz6, vz7);
548  vz3 = vec_sub(vz6, vz7);
549  vz8 = vec_perm(vz3, vz3, vcprm(2,3,0,1));
550 
551  vz0 = vec_add(vz4, vz5);
552  vz1 = vec_sub(vz4, vz5);
553 
554  vz3 = vec_madd(vz3, vc1, vc0);
555  vz3 = vec_madd(vz8, vc2, vz3);
556 
557  vz4 = vec_perm(vz0, vz1, vcprm(0,s0,1,s1));
558  vz5 = vec_perm(vz0, vz1, vcprm(2,s3,3,s2));
559  vz6 = vec_perm(vz2, vz3, vcprm(1,2,s3,s0));
560  vz7 = vec_perm(vz2, vz3, vcprm(0,3,s2,s1));
561 
562  vz0 = vec_add(vz4, vz5);
563  vz1 = vec_sub(vz4, vz5);
564  vz2 = vec_add(vz6, vz7);
565  vz3 = vec_sub(vz6, vz7);
566 
567  vz4 = vec_perm(vz0, vz1, vcprm(0,1,s0,s1));
568  vz5 = vec_perm(vz0, vz1, vcprm(2,3,s2,s3));
569  vz6 = vec_perm(vz2, vz3, vcprm(0,2,s1,s3));
570  vz7 = vec_perm(vz2, vz3, vcprm(1,3,s0,s2));
571 
572 
573  vz2 = vec_sub(vz4, vz6);
574  vz3 = vec_sub(vz5, vz7);
575 
576  vz0 = vec_add(vz4, vz6);
577  vz1 = vec_add(vz5, vz7);
578 
579  vec_st(vz0, 0, &(out[0]));
580  vec_st(vz1, byte_2complex, &(out[0]));
581  vec_st(vz2, byte_4complex, &(out[0]));
582  vec_st(vz3, byte_6complex, &(out[0]));
583  return;
584 }
585 
586 inline static void fft16_vsx(FFTComplex *z)
587 {
588  float* out= (float*)z;
589  vec_f vc0 = {0.0, 0.0, 0.0, 0.0};
590  vec_f vc1 = {-sqrthalf, sqrthalf, sqrthalf, -sqrthalf};
591  vec_f vc2 = {sqrthalf, sqrthalf, sqrthalf, sqrthalf};
592  vec_f vc3 = {1.0, 0.92387953, sqrthalf, 0.38268343};
593  vec_f vc4 = {0.0, 0.38268343, sqrthalf, 0.92387953};
594  vec_f vc5 = {-0.0, -0.38268343, -sqrthalf, -0.92387953};
595 
596  vec_f vz0, vz1, vz2, vz3;
597  vec_f vz4, vz5, vz6, vz7;
598  vec_f vz8, vz9, vz10, vz11;
599  vec_f vz12, vz13;
600 
601  vz0 = vec_ld(byte_8complex, &(out[0]));
602  vz1 = vec_ld(byte_10complex, &(out[0]));
603  vz2 = vec_ld(byte_12complex, &(out[0]));
604  vz3 = vec_ld(byte_14complex, &(out[0]));
605 
606  vz4 = vec_perm(vz0, vz1, vcprm(0,1,s2,s1));
607  vz5 = vec_perm(vz0, vz1, vcprm(2,3,s0,s3));
608  vz6 = vec_perm(vz2, vz3, vcprm(0,1,s2,s1));
609  vz7 = vec_perm(vz2, vz3, vcprm(2,3,s0,s3));
610 
611  vz0 = vec_add(vz4, vz5);
612  vz1= vec_sub(vz4, vz5);
613  vz2 = vec_add(vz6, vz7);
614  vz3 = vec_sub(vz6, vz7);
615 
616  vz4 = vec_perm(vz0, vz1, vcprm(0,s0,1,s1));
617  vz5 = vec_perm(vz0, vz1, vcprm(2,s3,3,s2));
618  vz6 = vec_perm(vz2, vz3, vcprm(0,s0,1,s1));
619  vz7 = vec_perm(vz2, vz3, vcprm(2,s3,3,s2));
620 
621  vz0 = vec_add(vz4, vz5);
622  vz1 = vec_sub(vz4, vz5);
623  vz2 = vec_add(vz6, vz7);
624  vz3 = vec_sub(vz6, vz7);
625 
626  vz4 = vec_perm(vz0, vz1, vcprm(0,1,s0,s1));
627  vz5 = vec_perm(vz0, vz1, vcprm(2,3,s2,s3));
628 
629  vz6 = vec_perm(vz2, vz3, vcprm(0,1,s0,s1));
630  vz7 = vec_perm(vz2, vz3, vcprm(2,3,s2,s3));
631 
632  vz0 = vec_ld(0, &(out[0]));
633  vz1 = vec_ld(byte_2complex, &(out[0]));
634  vz2 = vec_ld(byte_4complex, &(out[0]));
635  vz3 = vec_ld(byte_6complex, &(out[0]));
636  vz10 = vec_perm(vz2, vz3, vcprm(0,s0,1,s1));
637  vz11 = vec_perm(vz2, vz3, vcprm(2,s2,3,s3));
638  vz8 = vec_perm(vz0, vz1, vcprm(0,1,s2,s1));
639  vz9 = vec_perm(vz0, vz1, vcprm(2,3,s0,s3));
640 
641  vz2 = vec_add(vz10, vz11);
642  vz3 = vec_sub(vz10, vz11);
643  vz12 = vec_perm(vz3, vz3, vcprm(2,3,0,1));
644  vz0 = vec_add(vz8, vz9);
645  vz1 = vec_sub(vz8, vz9);
646 
647  vz3 = vec_madd(vz3, vc1, vc0);
648  vz3 = vec_madd(vz12, vc2, vz3);
649  vz8 = vec_perm(vz0, vz1, vcprm(0,s0,1,s1));
650  vz9 = vec_perm(vz0, vz1, vcprm(2,s3,3,s2));
651  vz10 = vec_perm(vz2, vz3, vcprm(1,2,s3,s0));
652  vz11 = vec_perm(vz2, vz3, vcprm(0,3,s2,s1));
653 
654  vz0 = vec_add(vz8, vz9);
655  vz1 = vec_sub(vz8, vz9);
656  vz2 = vec_add(vz10, vz11);
657  vz3 = vec_sub(vz10, vz11);
658 
659  vz8 = vec_perm(vz0, vz1, vcprm(0,1,s0,s1));
660  vz9 = vec_perm(vz0, vz1, vcprm(2,3,s2,s3));
661  vz10 = vec_perm(vz2, vz3, vcprm(0,2,s1,s3));
662  vz11 = vec_perm(vz2, vz3, vcprm(1,3,s0,s2));
663 
664  vz2 = vec_sub(vz8, vz10);
665  vz3 = vec_sub(vz9, vz11);
666  vz0 = vec_add(vz8, vz10);
667  vz1 = vec_add(vz9, vz11);
668 
669  vz8 = vec_madd(vz4, vc3, vc0);
670  vz9 = vec_madd(vz5, vc3, vc0);
671  vz10 = vec_madd(vz6, vc3, vc0);
672  vz11 = vec_madd(vz7, vc3, vc0);
673 
674  vz8 = vec_madd(vz5, vc4, vz8);
675  vz9 = vec_madd(vz4, vc5, vz9);
676  vz10 = vec_madd(vz7, vc5, vz10);
677  vz11 = vec_madd(vz6, vc4, vz11);
678 
679  vz12 = vec_sub(vz10, vz8);
680  vz10 = vec_add(vz10, vz8);
681 
682  vz13 = vec_sub(vz9, vz11);
683  vz11 = vec_add(vz9, vz11);
684 
685  vz4 = vec_sub(vz0, vz10);
686  vz0 = vec_add(vz0, vz10);
687 
688  vz7= vec_sub(vz3, vz12);
689  vz3= vec_add(vz3, vz12);
690 
691  vz5 = vec_sub(vz1, vz11);
692  vz1 = vec_add(vz1, vz11);
693 
694  vz6 = vec_sub(vz2, vz13);
695  vz2 = vec_add(vz2, vz13);
696 
697  vec_st(vz0, 0, &(out[0]));
698  vec_st(vz1, byte_2complex, &(out[0]));
699  vec_st(vz2, byte_4complex, &(out[0]));
700  vec_st(vz3, byte_6complex, &(out[0]));
701  vec_st(vz4, byte_8complex, &(out[0]));
702  vec_st(vz5, byte_10complex, &(out[0]));
703  vec_st(vz6, byte_12complex, &(out[0]));
704  vec_st(vz7, byte_14complex, &(out[0]));
705  return;
706 
707 }
708 inline static void pass_vsx(FFTComplex * z, const FFTSample * wre, unsigned int n)
709 {
710  int o1 = n<<1;
711  int o2 = n<<2;
712  int o3 = o1+o2;
713  int i1, i2, i3;
714  FFTSample* out = (FFTSample*)z;
715  const FFTSample *wim = wre+o1;
716  vec_f v0, v1, v2, v3;
717  vec_f v4, v5, v6, v7;
718  vec_f v8, v9, v10, v11;
719  vec_f v12, v13;
720 
721  n = n-2;
722  i1 = o1*sizeof(FFTComplex);
723  i2 = o2*sizeof(FFTComplex);
724  i3 = o3*sizeof(FFTComplex);
725 
726  v8 = vec_ld(0, &(wre[0]));
727  v10 = vec_ld(0, &(wim[0]));
728  v9 = vec_ld(0, &(wim[-4]));
729  v9 = vec_perm(v9, v10, vcprm(s0,3,2,1));
730 
731  v4 = vec_ld(i2, &(out[0]));
732  v5 = vec_ld(i2+16, &(out[0]));
733  v6 = vec_ld(i3, &(out[0]));
734  v7 = vec_ld(i3+16, &(out[0]));
735  v10 = vec_mul(v4, v8); // r2*wre
736  v11 = vec_mul(v5, v8); // i2*wre
737  v12 = vec_mul(v6, v8); // r3*wre
738  v13 = vec_mul(v7, v8); // i3*wre
739 
740  v0 = vec_ld(0, &(out[0])); // r0
741  v3 = vec_ld(i1+16, &(out[0])); // i1
742  v10 = vec_madd(v5, v9, v10); // r2*wim
743  v11 = vec_nmsub(v4, v9, v11); // i2*wim
744  v12 = vec_nmsub(v7, v9, v12); // r3*wim
745  v13 = vec_madd(v6, v9, v13); // i3*wim
746 
747  v1 = vec_ld(16, &(out[0])); // i0
748  v2 = vec_ld(i1, &(out[0])); // r1
749  v8 = vec_sub(v12, v10);
750  v12 = vec_add(v12, v10);
751  v9 = vec_sub(v11, v13);
752  v13 = vec_add(v11, v13);
753  v4 = vec_sub(v0, v12);
754  v0 = vec_add(v0, v12);
755  v7 = vec_sub(v3, v8);
756  v3 = vec_add(v3, v8);
757 
758  vec_st(v0, 0, &(out[0])); // r0
759  vec_st(v3, i1+16, &(out[0])); // i1
760  vec_st(v4, i2, &(out[0])); // r2
761  vec_st(v7, i3+16, &(out[0]));// i3
762 
763  v5 = vec_sub(v1, v13);
764  v1 = vec_add(v1, v13);
765  v6 = vec_sub(v2, v9);
766  v2 = vec_add(v2, v9);
767 
768  vec_st(v1, 16, &(out[0])); // i0
769  vec_st(v2, i1, &(out[0])); // r1
770  vec_st(v5, i2+16, &(out[0])); // i2
771  vec_st(v6, i3, &(out[0])); // r3
772 
773  do {
774  out += 8;
775  wre += 4;
776  wim -= 4;
777 
778  v8 = vec_ld(0, &(wre[0]));
779  v10 = vec_ld(0, &(wim[0]));
780  v9 = vec_ld(0, &(wim[-4]));
781  v9 = vec_perm(v9, v10, vcprm(s0,3,2,1));
782 
783  v4 = vec_ld(i2, &(out[0])); // r2
784  v5 = vec_ld(i2+16, &(out[0])); // i2
785  v6 = vec_ld(i3, &(out[0])); // r3
786  v7 = vec_ld(i3+16, &(out[0]));// i3
787  v10 = vec_mul(v4, v8); // r2*wre
788  v11 = vec_mul(v5, v8); // i2*wre
789  v12 = vec_mul(v6, v8); // r3*wre
790  v13 = vec_mul(v7, v8); // i3*wre
791 
792  v0 = vec_ld(0, &(out[0])); // r0
793  v3 = vec_ld(i1+16, &(out[0])); // i1
794  v10 = vec_madd(v5, v9, v10); // r2*wim
795  v11 = vec_nmsub(v4, v9, v11); // i2*wim
796  v12 = vec_nmsub(v7, v9, v12); // r3*wim
797  v13 = vec_madd(v6, v9, v13); // i3*wim
798 
799  v1 = vec_ld(16, &(out[0])); // i0
800  v2 = vec_ld(i1, &(out[0])); // r1
801  v8 = vec_sub(v12, v10);
802  v12 = vec_add(v12, v10);
803  v9 = vec_sub(v11, v13);
804  v13 = vec_add(v11, v13);
805  v4 = vec_sub(v0, v12);
806  v0 = vec_add(v0, v12);
807  v7 = vec_sub(v3, v8);
808  v3 = vec_add(v3, v8);
809 
810  vec_st(v0, 0, &(out[0])); // r0
811  vec_st(v3, i1+16, &(out[0])); // i1
812  vec_st(v4, i2, &(out[0])); // r2
813  vec_st(v7, i3+16, &(out[0])); // i3
814 
815  v5 = vec_sub(v1, v13);
816  v1 = vec_add(v1, v13);
817  v6 = vec_sub(v2, v9);
818  v2 = vec_add(v2, v9);
819 
820  vec_st(v1, 16, &(out[0])); // i0
821  vec_st(v2, i1, &(out[0])); // r1
822  vec_st(v5, i2+16, &(out[0])); // i2
823  vec_st(v6, i3, &(out[0])); // r3
824  } while (n-=2);
825 }
826 
827 #endif
828 
829 #endif /* AVCODEC_PPC_FFT_VSX_H */
#define vec_f
Definition: util_altivec.h:40
const char * b
Definition: vf_curves.c:113
FFTSample re
Definition: avfft.h:38
GLfloat v0
Definition: opengl_enc.c:107
#define sqrthalf
Definition: fft-internal.h:64
#define s2
Definition: regdef.h:39
#define s0
Definition: regdef.h:37
float FFTSample
Definition: avfft.h:35
Definition: fft.h:88
#define s(width, name)
Definition: cbs_vp9.c:257
int n
Definition: avisynth_c.h:684
#define s3
Definition: regdef.h:40
#define s1
Definition: regdef.h:38
Contains misc utility macros and inline functions.
FFTSample im
Definition: avfft.h:38
static double c[64]
FILE * out
Definition: movenc.c:54